One or more wearable motion trackers, connected to a smartphone, deliver real-time 3D joint angles, position and velocity.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)

Soon, in-store sensors and motion trackers will watch your footsteps, see what your hands do, know when you hesitate and when you don't.

WSJ: Spying on Your Buying | Marvels

As part of a broader strategy, Xsens now offers IP originally developed for professional (B2B) applications of 3D body motion tracking using wearable motion trackers for mass market application in the consumer electronics industry.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)

If boaters, fishermen and beachgoers find these blocks and contact the scientists by the information on the blocks, they will help the debris trackers' understanding of the motion of debris and currents in this remote region.

MSN: Survey Keeping Close Tabs on Japan Tsunami Debris